[Event "Pro Chess League 2023"] [Site "Chess.com"] [Date "2023.02.14"] [Round "1"] [White "Wu, Rochelle"] [Black "Erigaisi, Arjun"] [Result "0-1"] [WhiteElo "2284"] [BlackElo "2701"] [Annotator "Lang,JJ"] [Variant "Standard"] [ECO "A53"] [Opening "Old Indian Defense"] [StudyName "PCL: Instructive moments from weeks 1 and 2"] [ChapterName "Wu, Rochelle - Erigaisi, Arjun"] [ChapterURL "https://lichess.org/study/r4rOm8dU/gOrMgf3P"] [Orientation "white"] { Attacking the exposed king } 1. d4 Nf6 2. c4 d6 3. Nf3 g6 4. Nc3 Nbd7 5. e4 e5 6. d5 Nc5 7. Qc2 a5 8. h3 Bg7 9. Be3 Nh5 10. g3 O-O 11. Be2 f5 12. O-O-O b6 13. Nh4? (13. Kb1 Nf6 14. Nd2 $14) 13... Nf4!? (13... f4! { The simple push was objectively stronger. } 14. Bxc5 fxg3! 15. Nxg6 hxg6 16. Be3 (16. Bxh5 bxc5 17. Be2 gxf2 $19) 16... gxf2 17. Bxh5 gxh5 18. Rdf1 Rf3 $17) 14. Bf1 (14. gxf4?? Qxh4 15. fxe5 Bxe5! 16. Qd2 fxe4 17. Kb1 Bf5 $19) 14... fxe4 15. Nxe4 a4! { This is what makes the attack so instructive. Before playing ...Bc8-f5, or looking at how to use the open f-file, Black simply increases opportunities to activate all of his pieces. Now ...a4-a3 opens up the a8-rook and even the dark-squared bishop, while White's a2-a3 allows ...Nc5-b3(+). } 16. Nxc5 (16. f3 Nh5 17. Bg5 Qe8 18. Rg1 a3 19. b3 Nf6 $17) 16... bxc5 17. Nf3 Bf5! 18. Qd2 Be4! 19. gxf4 Bxf3 20. Bd3 exf4 21. Bxf4 Rb8! { The simple 22. b3 is refuted by 22. ...Qf6! } 0-1